Optically driven Archimedes micro-screws for micropump application

Optically driven Archimedes micro-screws for micropump application.

Archimedes micro-screws have been fabricated by three-dimensional two-photon polymerization using a Nd:YAG Q-switched microchip laser at 532nm. Due to their small sizes they can be easily manipulated, and made to rotate using low power optical tweezers. Rotation rates up to 40 Hz are obtained with a laser power of 200 mW, i.e. 0.2 Hz/mW. A photo-driven micropump action in a microfluidic channel...

Rotational Efficiency of Photo-Driven Archimedes Screws for Micropumps

In this study, we characterized the rotational efficiency of the photo-driven Archimedes screw. The micron-sized Archimedes screws were fabricated using the two-photon polymerization technique. Free-floating screws trapped by optical tweezers align in the laser irradiation direction and rotate spontaneously. The influences of the screw pitch and the number of screw blades have been investigated...

Carbon nanotube Archimedes screws.

Recently, nanomechanical devices composed of a long stationary inner carbon nanotube and a shorter, slowly rotating outer tube have been fabricated. In this paper, we study the possibility of using such devices as nanoscale transducers of motion into electricity. When the outer tube is chiral, we show that such devices act like quantum Archimedes screws, which utilize mechanical energy to pump ...

A Resonantly-Driven Piezoelectric Micropump for Microfactory

For realization of micro fluid power sources applicable to microfactory or micromachines using fluid power with high power density, a resonantly-driven piezoelectric micropump with newly devised check valve unit is developed and a practical application to micro press is attempted. First, a micro sheet valve having a floating valve-body inside valve chest to increase valve-opening and to decreas...

Optically driven superconductivity